Morning Edition from NPR

First Aid Kit is two sisters, ages 18 and 21, from Sweden. But their music sounds like a slice of Americana: acoustic guitar, autoharp and lots of vocal harmony.

Klara and Johanna Soderberg wrote the songs for their new album, The Lion's Roar, while on their last tour. Many started with ideas, short riffs, recorded on a cellphone.

Booksellers and publishers are worried that Amazon is going to devour their industry. The giant online retailer seems to have its hands in all aspects of the business, from publishing books to selling them — and that has some in the book world wondering if there is any end to Amazon's influence.

The Florida Department of Law Enforcement faced accusations that a breathalyzer was giving inaccurate readings. So it commissioned a study. Fifteen employees consumed more than $300 worth of whiskey, mixers and Doritos, and then used the breathalyzer. Judges are considering whether the study was legitimate.

A frustrated judge in London recently exercised a little-known power: sending police into the street to rustle up jurors. The London Free Press reports lawyers in the case had questioned 130 potential jurors, and were still short. So unsuspecting pedestrians were hauled into court.

Newt Gingrich's swift rise has been fueled by one thing above all — his forceful performances in the debates. And Thursday night, Gingrich was dominant from the start when he got the first question. It was about an explosive television interview with his ex-wife Marianne.

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DAVID GREENE, HOST:

As Mara just mentioned, the debate last night opened with a question about a claim made by Gingrich's ex-wife. Well, Marianne Gingrich gave her exclusive interview to ABC's "Nightline," putting the candidate's personal life in the spotlight once again. NPR's Tamara Keith has more.

TAMARA KEITH, BYLINE: The interview was incredibly hyped, in part because Marianne Gingrich has been silent so far on her ex-husband's presidential candidacy. This was her first television interview since their 1999 divorce.

Saturday is South Carolina's Republican presidential primary. It's also the second anniversary of the Supreme Court's famous Citizens United decision.

That's the case that allows corporations to explicitly support or attack specific candidates. The day will be marked with attack ads — and protests.

The Republican presidential race has covered just three states so far. And superPACs linked to candidates Mitt Romney, Newt Gingrich, Rick Santorum and Ron Paul have spent a total of $20 million. They're feeding voters a heavy diet of negativity.

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RENEE MONTAGNE, HOST:

This is MORNING EDITION from NPR News. I'm Renee Montagne.

DAVID GREENE, HOST:

And I'm David Greene.

You may have thought Iowa was done counting its votes a few weeks ago. Well, then came the news this week that based on further review, Rick Santorum actually won more certified votes than the declared winner, Mitt Romney. The problem is the tallies from some precincts remain lost. And yesterday, Iowa's GOP chairman called the overall results inconclusive.

David Greene has business news.

Renee Montagne has the Last Word in business.